Caterpillar 20 Tractor Information; 1928; Form Number 5060A. Caterpillar Tractor Company, Peoria, Illinois; 44 pages.Dimensions are: ?. No copyright notice and no copyright registration; this document is Public Domain under Rule 5 of the U.S. Copyright Statutes. This work was created by Gerard Arthus and is in the Public Domain under the Creative Commons License. Any questions regarding this item should be directed to email@example.com: Send an Email For more information: http://OpenEducation.org Go to the above site to find out more about the digitization of this item and the on-going attempt to help make 'Knowledge' and 'Information' available to everyone, anywhere, at any time, for no cost. There are many forces at work which are attempting to turn 'Public Domain' information into a commodity which some can milk for a profit. This parasitic use of information which should be freely available for all to access is an Intellectual Crime and should not be tolerated. Hi-resolution images included.